JPH08160553A - Voice recording camera - Google Patents

Abstract

PURPOSE: To make the voices before and after photographing reliably recordable by controlling the start of recording using a shutter trigger button operation and the delay output of a delay circuit. CONSTITUTION: A memory control circuit 14 is connected to a half-push switch 2 and sends a data writing start signal to a memory 7 when the switch 2 is made on to start data writing. A shutter 8 is installed between a lens 9 and a film 10. Further a full-push switch 3 is connected to a delay circuit 11, which is connected to the shutter 8 and a memory control circuit 14. When the full- push switch 3 is made on, the delay circuit 11 immediately open the shutter 8 to expose the film 10 to light. When a specified period of time passes after the switch 3 is made on, the delay circuit 11 generates a data writing finish signal to be inputted to a semiconductor memory 7 and outputs it to the memory control circuit 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice recording camera most suitable for a still camera for recording voice associated with photographing on a silver salt film coated with a magnetic material.

[0002]

2. Description of the Related Art Since a conventional silver salt film is not coated with a magnetic substance, information could not be recorded on the magnetic substance. Therefore, the conventional still camera cannot record the sound at the time of shooting. In order to record the sound in association with the captured image, an IC card (JP-A-2-89044) or a magnetic disk (JP-A-2-297537) was used in addition to the silver salt film. That is, a recording medium other than the photographic film was required.

[0003]

In the conventional audio recording camera, since there is not one medium for recording video and audio, separate data for associating video data with audio data is required, and data management is required. It was very complicated.

The present invention has been made in view of the above problems, and enables recording without missing sounds before and after shooting, and easily manages video data and audio data without requiring special data. The purpose is to do.

[0005]

In order to achieve this object, an audio recording camera of the present invention is an audio recording camera capable of recording audio related to shooting on a photographic film, by half-pressing a shutter trigger button. A half-press switch that operates, a full-press switch that operates by full-pressing the shutter trigger button, and a delay circuit that generates a delay output after a predetermined time has elapsed from the time of operation of the full-press switch, The recording of the audio recording camera is started at the time of operation, and the recording of the audio recording camera is ended by the delay output of the delay circuit after the shutter trigger button is fully pressed.

[0006]

In the voice recording camera having the above structure, since the recording start control is performed by the shutter trigger button operation and the delay output of the delay circuit, the sound before and after the shooting can be recorded without being missed. Since the video data and the audio data are recorded in association with each other at the time of shooting, the video data and the audio data can be easily managed without requiring separate data.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block connection diagram showing an embodiment of a voice recording camera according to the present invention.

In FIG. 1, a shutter trigger button 1
A half-push switch 2 that is turned on during the stroke operation and a full-push switch 3 that is turned on when the stroke is fully pressed are added to the. The microphone 4 for detecting sound is arranged so as to be directed to the subject, and the audio output of the microphone 4 is supplied to the A / D conversion circuit 6 via the amplifier 5 and converted into a digital signal. The audio signal converted into a digital signal is stored in the memory 7
Is written to. Writing and reading of the memory 7 are performed by the memory control circuit 14. Memory control circuit 14
Is connected to the half-push switch 2, and when the half-push switch 2 is turned on, a data write start signal is sent to the memory 7
To start writing data.

The shutter 8 includes a lens 9 and a film 10.
It is provided between. Full-press switch 3 is delay circuit 1
1 and the delay circuit 11 is connected to the shutter 8 and the memory control circuit 14. When the full-press switch 3 is turned on (time t2 in FIG. 2), the delay circuit 11 immediately opens the shutter 8 to expose the film 10 (FIG. 2).
(C)). After a predetermined delay time has passed since the full-press switch 3 was turned on (time t3 in FIG. 2), the delay circuit 1
1 generates a data write end signal to the semiconductor memory 7 and outputs it to the memory control circuit 14. In the semiconductor memory 7, a voice signal from time t1 when the half-press switch 2 is turned on to time t3 when the delay circuit 11 outputs the delay signal is recorded (FIG. 2 (e)).

The memory control circuit 14 reads the memory 7 and supplies it to the data compression circuit 12.

The data compression circuit 12 compresses the digital signal read from the semiconductor memory 7 and supplies it to the modulation circuit 15. The modulation circuit 15 modulates a recording signal suitable for magnetic recording on a magnetic material on the film 10 and the amplifier 1
Supply to 6. The amplifier 16 outputs the amplified recording signal to the magnetic head 13 during the winding operation of the film 10 to perform magnetic recording.

In this way, the write start instruction is sent to the memory control circuit 14 by the operation of the half-press switch 2, and the sound detected by the microphone 4 is digitized through the amplifier 5 and the A / D conversion circuit 6, and is then sent to the semiconductor memory 7. Start digital recording. The shutter 8 is operated by the operation of the full-press switch 3. After the shutter operation is completed, the recording is completed after a predetermined time generated by the delay circuit 11 has passed. When the film is wound, the magnetic head 13 writes the data on the film via the compression circuit 12 while reading the data from the semiconductor memory 7. The data compression circuit 12 is arranged before recording in the memory, and a method of recording in a state in which the amount of data is small may be considered. The data compression in the data compression circuit 12 may be processed by software instead of using hardware.

According to the embodiment described above, since the shutter trigger button operation and the recording start control are associated with each other, it is possible to record without missing the sound before and after the photographing. Further, since the sound is temporarily held in the semiconductor memory and the data is compressed, the sound is recorded on the film by the magnetic head when the film is wound up.

The present invention has been described above with reference to the embodiments.
According to the technical idea of the present invention, various modifications are possible. For example, in the above-described embodiments, the memory control circuit 14 is described as sending and receiving the data write start signal and the data write end signal to the memory 7, thereby starting and ending the data write. 14 may send a signal that increments (counts up) the address of the memory 7 only when writing data, and may send a fixed address signal when not writing.

[0016]

As described above, according to the voice recording camera of the present invention, the recording start control is performed by the shutter trigger button operation and the delay output of the delay circuit.
It is possible to record without missing the sound before and after shooting. Since the video data and the audio data are recorded in association with each other at the time of shooting, it is possible to easily manage the video data and the audio data without requiring separate data.

[Brief description of drawings]

FIG. 1 is a block connection diagram showing an embodiment of a voice recording camera according to the present invention.

FIG. 2 is a timing chart showing an embodiment of a voice recording camera according to the present invention.

[Explanation of symbols]

 1 Shutter trigger button 2 Half-press switch 3 Full-press switch 4 Microphone 5 Amplifier 6 A / D conversion circuit 7 Semiconductor memory 8 Shutter mechanism 9 Shooting lens 10 Film 11 Delay time generation circuit 12 Digital data compression circuit 13 Magnetic head 14 Memory control circuit 15 Modulation circuit 16 Amplifier

Claims (4)

[Claims] 1. A sound recording camera capable of recording a sound related to shooting on a photographic film, wherein a half-press switch which is operated by half-pressing a shutter trigger button and a full-press switch which is operated by fully-pressing a shutter trigger button. And a delay circuit that generates a delayed output after a predetermined time has elapsed from the time of operating the full-press switch, starts recording of the voice recording camera when the half-press switch operates, and fully presses the shutter trigger button. The audio recording camera, characterized in that the recording of the audio recording camera is terminated by the later delayed output of the delay circuit. 2. The A / D for converting an analog input voice signal into a digital signal according to claim 1.
The semiconductor device further comprises a D conversion circuit, a semiconductor memory for temporarily storing a digital signal output from the A / D conversion circuit, and a film winding mechanism for winding a photographic film after the photographing is finished. Sometimes the recording is started in the semiconductor memory, and after the shutter trigger button is fully pressed, the recording in the semiconductor memory is ended by the delay output of the delay circuit, and the audio signal recorded in the semiconductor memory is recorded in the film winding. An audio recording camera characterized by recording on the photographic film when the upper mechanism winds the photographic film. 3. The film winding apparatus according to claim 2, further comprising data compression means for data-compressing the digital signal stored in the semiconductor memory, wherein the audio signal recorded by the data compression in the semiconductor memory is recorded. An audio recording camera characterized by recording on a photographic film when the mechanism winds the photographic film. 4. The audio signal selected by the selecting device according to claim 2, further comprising a selecting device for selecting a part of the audio signal temporarily stored in the semiconductor memory. An audio recording camera, characterized in that, when the film winding mechanism winds up the photographic film, the film is recorded on the photographic film.